Stack valve of water gas generators and the like



April 11, 1950 MacGREGOR 2,503,625

STACK VALVE OF WATER GAS GENERATORS AND THE LIKE Filed 'July 2 5, 1945 s Sheets-Sheet 1 April 11,1950 MacGREGQR STACK VALVE OF WATER GAS GENERATORS AND THE LIKE 3 Sheets-Sheet 2 Filed July 23, 1945 April 11, 1950 F. A. MacG 2,503,625

STACK VALVE OF WATER GAS GENERATORS AND THE LIKE 4 Filed July 25, 1945 V 3 Sheets-Sheet 3 WM 4661? My Patented Apr. 11, 1950 STACK VALVE OF WATER GAS GENERATORS AND THE LIKE Frank Alexander MacGregor, Westminster, England, assignor, by mesne assignments, to Humphreys & Glasgow Limited, Westminster, England 7 Application July 23, 1945, Serial No. 606,558

In Great Britain July 24, 1944 In water gas plants it is necessary to arrange the stack valve in an accessible position which is usually within the building housing the plant.

In order to avoid the escape of waste gases, grits, and fliers into the'building, it is often the practice to enclose the valve in a fixed casing continuous with the stack, sections of which casing can be removed to permit inspection and the maintenance and lubrication of the valve and its gear. With such an arrangement a considerable part of the valve carrying and operating mechanism is disposed within the casing, is operated under very arduous conditions, and is diflicult to maintain in a proper condition.

According to the present invention a portion or section'of the casing is moved with the valve so that when the valve is closed the portion or section is moved to leave a sufficient opening in the stack for the valve to be clearly visible and accessible and when the valve is opened the portion or section is moved to close the opening in the stack, the valve, its carrying gear and operating mechanism then being disposed outside the stack and in a position in which it can be inspected, greased, or repaired.

In the accompanying diagrammatic drawings Figs. 1 and 2 are side elevations showing parts only of the stack and casing, and showing the valve and connected parts in the closed and open positions respectively. Figs. 3 and 4 are similar views of another arrangement. Fig. 5 is a partial transverse section on the line 5-5, Fig. 6. Fig. 6 is a top plan view of the valve and operating mechanism shown in Fig. 1.

Referring to Figs. 1 and 2, 5 and 6, a represents the stack and b the casing above it and serving as a flue to carry off the waste gases, grits, and

A section b of the casing b is movable and connected to the valve 0 which is suspended from an arm 11 pivotally mounted on the axle e of wheels 1 running on tracks 9 extending laterally of the stack. The valve 0 is shown suspended from the arm d by link 0 having a pin and slot connection with the arm (1.

The removable section b of the casing is shown tapering from one side to the other, and its'deeper side is pivotally connected to a supporting link h which is pivoted at h. to the stack casing; the opposite or shallow side of the section b is coupled as by a hook (or hooks) M0 the axle e;

When the plant is shut down, the stack valve is in the position shown in Fig. 2 and the hook connection 2' to the axle 6 enables the section b to be disconnected therefrom and moved away 10 Claims. (Cl. 126285) as in Fig. 1 to permit inspection of the valve 0 seating at the top of the stack a I The arm 01 is coupled to a bell crank 70, movement of which moves the wheels j along the tracks g and swings the arm at about the axle e.

k is a rod connecting the bell crank k to the operating gear which may be of any suitable kind.

The valve opening movement raises the valve 0 from its seat on the top of the stack a and moves it outside the casing 12 and also moves the section 22 into position to complete the casing as shown in Fig. 2. The valve closing movement brings the valve over its seating and during the latter part of the closing movement the valve is deposited on its seat, the section b being also moved clear of the stack so that the seated valve can be observed.

The removable section b may be supported by an additional pair of wheels running on an extension of the tracks g, instead of being supported by the link h.

In the arrangement shown in Figs. 3 and 4, a section b corresponding to say a circumferential half of the casing, is movable within the casing; the section is secured to long side levers m pivoted at n to the fixed half section of the casing. 0,.0 are toggle links connecting the section b to the sides of the stack. The knuckle of the toggle links is connected by links q to arms r on the shaft of the bell crank it.

The knuckle of the toggle links is shown in Fig. 3 as passing the dead centre so that the Weight of the section b does not tend to move the gear and valve to the open position. i o

The movablesection b and the inside of the fixed part of the casing b may be formed with lips or flanges p, p which meet when the section is in the enclosing position.

What I claim is:

1. In combination, a stack; a flue casing aligned with and forming part of the stack; a removable section in the flue adjacent the end of the stack which when removed provides an access opening to the end of said stack; a valve for closing the end of said stack; said valve being movable inwardly through said access opening into position to close the stack, and movable outwardly through said access opening to open said stack; and means for supporting and moving the valve laterally out of the stack into open position and into the stack into closed position; said means having connections with the removable flue section for moving the removable section out of said flue as the valve is closed and for moving said flue section into the flue as the valve is opened.

2. In a combination as set forth in claim 1, said removable section comprising a complete section of the flue which is moved laterally of the stack when the valve is closed; means for supporting said section; and said connections comprising a link connecting the section and the valve supporting and moving means.

3. In a combination as set forth in claim 1, said removable section comprising a circumferential half portion of the flue opposite the valve supporting means; pivoted arms supporting the section within the flue; and said connections comprising links connecting said arms and the said valve supporting and moving means.

4. In combination, a stack; a flue casing aligned with and forming part of the stack; a removable section in the flue adjacent the end of the stack which when removed provides an access opening to the end of said stack; a valve for closing the end of said stack; said valve being movable inwardly through said access opening into position to close said stack, and movable outwardly through said access opening to open said stack; and means for supporting and moving the valve laterally out of the stack into open position and into the stack into closed position; said means having connections with the removable flue section for moving the removable section, whereby when the valve is closing the removable section will be moved to permit entry of the valve into the stack and provide an access opening in the stack for viewing the valve when closed, and when the valve is moved into open position the removable section will be returned into position to close the access opening.

5. In a combination as set forth in claim 4, said removable section comprising a complete section of the flue which is moved laterally of the,

stack when the valve is closed; means for supporting said section; and said connections comprising a link connecting the section and the valve supporting and moving means.

6. In a combination as set forth in claim 4,

said removable section comprising a circumferential half portion of, the flue opposite the valve supporting means; pivoted arms supporting the section within the flue; and said connections comprising links connecting said arms and the said valve supporting and moving means.

'7. The combination of a stack, a valve seat thereon, aflue, forming anextension of the stack above the valve seat and provided with a movable section adjacent the valve seat which when removed provides an access opening to the valve seat; wheel tracks extending exteriorly of and to one side of the stack adjacent the valve seat; wheels running on said tracks, an axle on which said wheels are mounted, an arm pivoted on said axle, an. operating bell crank lever pivoted on said tracks and coupled to said arm, a valve suspended from said arm and adapted to rest on the seat in one position of the bell crank; said valve being movable inwardly through said access opening into position to close the stack, and movable outwardly through the access opening to open the stack; and means connecting the movable section of the flue with the axle, whereby when the valve is open same is positioned outside the flue and the movable section closes the opening in the flue, and when the valve is closed the movablesection is moved to provide said opening in 4 the flue through which the valve is visible and accessible.

8. The combination of a stack, a valve seat thereon, a flue forming an extension of the stack above the valve seat and provided with a movable section adjacent the valve seat which when removed provides an access opening to the valve seat; wheel tracks extending exteriorly of and to one side of the stack adjacent the valve seat; wheels running on said tracks, an axle on which said wheels are mounted, an arm pivoted on said axle, an operating bell crank lever pivoted on said tracks and coupled to said arm, a valve suspended from said arm and adapted to rest on the seat in one position of the bell crank said valve being movable inwardly through said access opening into position to close the stack, and movable outwardly through the access opening to open the stack; and means connecting the movable section of the flue with the bell crank, whereby when the valve is open same is positioned outside the flue and the movable section closes the opening in the flue, and when the valve is closed the movable section is moved to provide said opening in the flue through which the valve is visible and accessible.

9. The combination of a stack, a valve seat thereon, a flue forming an extension of the stack above the valve seat and provided with a movable section which when removed provides an access opening to the valve seat; wheel tracks extending exteriorly of the stack; wheels running on said tracks, an axle on which said wheels are mounted, an arm pivoted on said axle, an operating bell crank lever coupled to said arm, a valve suspended from said arm and adapted to rest on the seat in one position of the bell crank; said valve being movable inwardly through said access opening into position to close the stack, and movable outwardly through the access opening to open the stack; and means connecting the movable section of the flue with the bell crank; said means comprising toggle links linked to the bell crank lever, whereby when the valve is open same is positioned outside the flue and the movable section closes'the opening in the flue, and when the valve is. closed the. movable section is moved to provide said opening in the casing through which the valve is visible and accessible.

10. In a combination as set forth in claim 9, said removable section comprising a circumferential half portion of the flue; and pivoted arms extending outside the flue supporting the section Within the flue.

FRANK ALEXANDER MAcGREGOR.

REFERENCES CITED The following references are of record in. the file of this patent:

UNITED STATES PATENTS Number Name Date 83,139 Deily Oct. 20, 1868 1,506,386 Schauman Aug. 26, 1924 2,029,151 Bigelow Jan. 28, 1936 2,229,165 Bowland Jan. 21, 1941 FOREIGN PATENTS Number Country Date 290,449 Great Britain May 2'7, .192? 

